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Tensile properties of defect-prefabricated 3D woven composites: Experiments and simulations
Journal of Industrial Textiles ( IF 3.2 ) Pub Date : 2021-09-01 , DOI: 10.1177/15280837211039569
Liming Xu 1 , Deng’an Cai 1 , Chao Li 2 , Xingyu Jin 1 , Guangming Zhou 1
Affiliation  

Three-dimensional (3D) woven composites have been widely used in structural components due to their excellent mechanical and near-net-shape properties. However, for some special applications, it is expected that 3D woven composites can be damaged at designated locations under a specific load. In this research work, a new kind of defect-prefabricated 3D woven composites (DP3DWCs) are designed, where defects are prefabricated by cutting weft or warp yarns in defect-free 3D woven composites (DF3DWCs). The tensile mechanical properties of the DF3DWCs and the DP3DWCs are investigated experimentally and numerically. The mesoscopic geometry models of the DF3DWCs and the DP3DWCs were established by multi-objective searching algorithm. The progressive damage models were established using the 3D Hashin criteria and the von Mises failure criterion. Numerical results agree well with the experimental data. The influence of the number of defect layers on the mechanical properties was also discussed. The obtained results indicate that the defects have little effect on the elastic modulus, while tensile strengths decrease linearly with the increase of the number of defect layers. Failure mechanisms of yarns and matrix in the non-defective and defective materials were studied, and the volume fraction of elements of each failure mode was computed and analysed.



中文翻译:

缺陷预制 3D 编织复合材料的拉伸性能:实验和模拟

三维 (3D) 编织复合材料由于其优异的机械性能和近净形状性能,已广泛应用于结构部件中。但是,对于某些特殊应用,预计 3D 编织复合材料会在特定负载下在指定位置损坏。在这项研究工作中,设计了一种新型的缺陷预制 3D 编织复合材料 (DP3DWCs),其中通过在无缺陷 3D 编织复合材料 (DF3DWCs) 中切割纬纱或经纱来预制缺陷。DF3DWCs 和 DP3DWCs 的拉伸力学性能进行了实验和数值研究。通过多目标搜索算法建立了DF3DWCs和DP3DWCs的细观几何模型。渐进式损伤模型是使用 3D Hashin 准则和 von Mises 失效准则建立的。数值结果与实验数据吻合良好。还讨论了缺陷层数对机械性能的影响。结果表明,缺陷对弹性模量的影响很小,而拉伸强度随着缺陷层数的增加而线性下降。研究了无缺陷和有缺陷材料中纱线和基体的失效机理,并计算和分析了每种失效模式的元素体积分数。

更新日期:2021-09-01
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